You can make any topic interesting with the correct approach.
For example, a few years ago I was talking about how much it had been raining, and how we could expect a lot more because of the southern oscillation just started. My friend didn’t know about La Nina or El Nino so I explained it briefly, and why it’s also partially responsible for things like bushfires. We probably talked about it for half an hour or more.
Sometimes I talk about my hobbies with my family, which aren’t always particular topics of interest for them, but you sometimes need something to keep things going. It’s a tricky dance between being nuanced and being relevant, but the point is to give them something to segue into if they’ve got nothing at the time.
For example, I might be talking with my Dad about a game I’ve been playing which he hasn’t heard of. I tell him it’s an RPG, which he doesn’t like, but then I mention its SciFi, similar to Mass Effect. That’s when he mentions he saw the new Guardians of the Galaxy movie. Cool, we just switched tracks.
So I guess my answer is: a good hint a conversation will be boring is when there is an expectation it will be. Both people are responsible for making it work.